Definition
Forensic rhetoric — from the Latin forum, the public square where Roman courts met — is the rhetoric of the past. It is the second of Aristotle's three branches and asks: what happened, and who is responsible? Its native settings are the courtroom, the inquiry, the inquest, the public investigation, and any setting in which evidence about past events must be marshalled toward a judgment of innocence, guilt, or liability. Its characteristic appeals are to fact, intention, motive, and the just versus the unjust.
The classical handbooks gave forensic rhetoric the most elaborate technical apparatus of the three branches, because trials demanded precision: the orator had to handle witnesses, contracts, oaths, and the dispositions of judges. Cicero's surviving speeches are mostly forensic, and the Rhetorica ad Herennium devotes its longest treatment to forensic technique.
Why it matters
How it works
A forensic case is structured around stasis theory — the question of where the dispute really lies. The first stasis is conjectural: did the act occur, and did the accused do it? The second is definitional: granted the act, what is the right name for it (theft, borrowing, fair use)? The third is qualitative: granted the name, was it justified, mitigated, or aggravated? The fourth is jurisdictional: is this the right forum to decide it? An effective forensic orator identifies the stasis precisely and concentrates argument there, rather than scattering across all four.
The same architecture governs modern courtroom advocacy, much investigative journalism, and the apologia of accused public figures. Whenever the question is what happened and who is to blame, forensic rhetoric is the form the argument takes — even when the participants would not call it that.